I'm delighted that Bill Gates is reading the important work of the late Julian Simon ("Gates Calls for Kinder Capitalism," January 24). When he digests Mr. Simon's central idea - that human beings in market economies are "the ultimate resource" - Mr. Gates might then recognize that there is no need to change capitalism so that it becomes "creative." Capitalism has always been creative. It is inherently creative.

Everything from apparently mundane pencils and stocked supermarket shelves to obviously complex skyscrapers and personal computers are astonishingly complex artifacts created by human ingenuity unleashed, as only capitalism can unleash it, to experiment, cooperate, and compete. No philanthropist, no government body or commission, no Great Leader - no matter how "creative" or "kind" - has done one-trillionth as much to give dignity and comfort to ordinary people as has capitalism. It doesn't need re-inventing or to be made kinder; it just needs to be spread more widely around the world